CaphLabs

<p>Keep Originals Safe, convert JPEG/PNG images to WebP and makes WebP the canonical file. WP returns <code>.webp</code> URLs, Keeping originals safely archived.</p>
<h3>How it works (high level)</h3>
<ol>
<li>
<p><strong>Convert</strong></p>
<ul>
<li>For a JPG/PNG attachment, the plugin generates a WebP for the full image and all WordPress-generated sizes.</li>
<li>Conversion is done through WordPress’ image editor system (<strong>WP_Image_Editor</strong>), meaning it uses <strong>GD</strong> or <strong>Imagick</strong> (whichever your server supports) with WebP support enabled.</li>
</ul>
</li>
<li>
<p><strong>Move originals</strong></p>
<ul>
<li>The original JPG/PNG files are moved to:
<ul>
<li><code>wp-content/uploads/_originals/...</code></li>
</ul>
</li>
<li>The folder structure mirrors your uploads structure.</li>
</ul>
</li>
<li>
<p><strong>Update WordPress to serve WebP</strong></p>
<ul>
<li>Attachment “file” + metadata are updated so WordPress serves <code>.webp</code> as the attachment file.</li>
<li>Attachment mime type is updated to <code>image/webp</code>.</li>
</ul>
</li>
<li>
<p><strong>Optional: Replace old URLs everywhere</strong></p>
<ul>
<li>If enabled, the plugin can replace old <code>.jpg/.png</code> URLs across:
<ul>
<li>post content</li>
<li>postmeta</li>
</ul>
</li>
<li>Replacement is <strong>serialized-safe</strong> (does not break serialized arrays).</li>
</ul>
</li>
</ol>
<h3>Background jobs (keeps running after page reload)</h3>
<p>Conversion/repair/sweep jobs are designed to run in the background. They keep ticking even if you refresh the page or close the tab.</p>
<p>The plugin uses multiple loopback methods (admin-post / REST / public tick fallback) so it can keep working even on restrictive hosting setups.</p>
<h3>Log + “it looks frozen” note</h3>
<p>A rolling “terminal style” log is written to:<br />
– <code>wp-content/uploads/hsbc-webp-only/logs/webp-only.log</code></p>
<p>If the log appears to freeze in the admin page:<br />
– click <strong>Refresh Log</strong>, or<br />
– refresh the page</p>
<p>The job may still be running server-side; refreshing the log/page usually catches up.</p>
<h3>Usage</h3>
<p>Go to <strong>Media <span aria-hidden="true" class="wp-exclude-emoji">→</span> WebP Only</strong>.</p>
<h3>Settings</h3>
<ul>
<li><strong>Quality</strong>
<ul>
<li>WebP quality for conversion (0–100).</li>
</ul>
</li>
<li><strong>Batch size</strong>
<ul>
<li>How many items to process per tick. Smaller batches reduce server load.</li>
</ul>
</li>
<li><strong>Replace old .jpg/.png URLs across content + postmeta (serialized-safe)</strong>
<ul>
<li>Recommended if your site content contains hard-coded image URLs.</li>
</ul>
</li>
<li><strong>Sweep Include / Exclude</strong>
<ul>
<li>Used by the Sweep tools to control which folders are scanned.</li>
</ul>
</li>
</ul>
<h3>Conversion Jobs (buttons)</h3>
<p><strong>Start Bulk Convert</strong><br />
– Converts Media Library attachments (JPG/PNG) in batches.<br />
– Moves originals to <code>uploads/_originals/</code>.<br />
– Updates attachment metadata so WordPress serves <code>.webp</code>.<br />
– Optional URL replacement (content + postmeta).</p>
<p><strong>Start Repair/Cleanup</strong><br />
– Repairs inconsistencies if something was partially converted or moved.<br />
– Useful after restores/migrations or if some attachments have mismatched metadata.<br />
– Optional URL replacement.</p>
<p><strong>Start Folder Sweep</strong><br />
– Scans the filesystem for eligible images (based on your Sweep Include/Exclude rules).<br />
– Designed for sites with additional image folders beyond standard uploads.<br />
– Optional URL replacement.</p>
<p><strong>Stop Job</strong><br />
– Stops the currently running job.</p>
<h3>Maintenance / Cleanup (buttons)</h3>
<p><strong>Delete duplicate _originals</strong><br />
– Deletes backup files in <code>uploads/_originals/</code> *only when* an identical file already exists in <code>uploads/</code>.<br />
– This is a cleanup tool for situations where originals were restored back into uploads and you no longer need the archived duplicate.</p>
<p><strong>Delete duplicate _webp</strong><br />
– Removes orphaned WebP cache files in:<br />
  – <code>uploads/_webp/</code><br />
– Only deletes WebP files that no longer match anything in <code>uploads/</code> or <code>uploads/_originals/</code>.</p>
<p><strong>Delete duplicate sweep _originals</strong><br />
– Maintenance cleanup for <strong>non-uploads</strong> roots (folders under <code>wp-content/</code>) that contain their own <code>_originals/</code> folders.<br />
– It uses your <strong>Sweep Include</strong> list to find those roots.<br />
– Only deletes a file from <code><root>/_originals/</code> when the same file exists at <code><root>/</code> AND the file size matches (safe duplicate).</p>
<p><strong>Revert Everything</strong><br />
– Restores original JPG/PNG files from <code>uploads/_originals/</code> back into <code>uploads/</code>.<br />
– Reverts attachment metadata so WordPress serves the originals again.</p>
<h3>Log controls</h3>
<p><strong>Refresh Log</strong><br />
– Pulls the latest log tail into the admin screen.</p>
<p><strong>Reset Log</strong><br />
– Clears the log file.</p>
<h3>Requirements</h3>
<ul>
<li>WordPress’ image editor must support WebP.
<ul>
<li><strong>GD</strong> with WebP support, or</li>
<li><strong>Imagick</strong> with WebP support</li>
</ul>
</li>
<li>If WebP conversion is not supported on your server, conversion/repair/sweep will refuse to run (revert tools can still work).</li>
</ul>


OrigiSafe — Advanced Image Optimizer (WebP) — Keep Originals Safe

Convert JPG/PNG uploads (and existing library) to WebP, move originals to /uploads/_originals/, and update Media Library metadata - WP serves .webp

KeyCDN

<p>Cache Enabler is a simple, yet powerful WordPress caching plugin that is easy to use, needs minimal configuration, and best of all helps improve site performance for a faster load time. It creates static HTML files of frontend pages and stores them on the server’s disk. This allows the static HTML files to be delivered instead of generating pages on the fly, avoiding resource intensive backend processes from the WordPress core, plugins, and database.</p>
<h4>Features</h4>
<ul>
<li>Fast and efficient cache engine</li>
<li>Automatic smart cache clearing</li>
<li>Manual cache clearing</li>
<li>WP-CLI cache clearing</li>
<li>Cache expiry</li>
<li>WebP support (convert images to WebP with <a href="https://optimus.io" rel="nofollow ugc">Optimus</a>)</li>
<li>Mobile support</li>
<li>Brotli and Gzip pre-compression support</li>
<li>Minification of HTML excluding or including inline CSS and JavaScript</li>
<li>Real-time cache size display in the WordPress dashboard</li>
<li>Custom post type support</li>
<li><code>304 Not Modified</code> support</li>
<li>Works perfectly with <a href="https://wordpress.org/plugins/autoptimize/" rel="ugc">Autoptimize</a></li>
</ul>
<h4>How does the caching work?</h4>
<p>Cache Enabler captures page contents and saves it as a static HTML file on the server’s disk. The static HTML file created can be one of several possible cache versions depending on the plugin settings and HTTP request. Accepted static HTML files are then delivered without any database queries or on the fly compression, allowing for a quicker page load.</p>
<h4>Documentation</h4>
<ul>
<li><a href="https://www.keycdn.com/support/wordpress-cache-enabler-plugin#installation" rel="nofollow ugc">Installation</a></li>
<li><a href="https://www.keycdn.com/support/wordpress-cache-enabler-plugin#settings" rel="nofollow ugc">Settings</a></li>
<li><a href="https://www.keycdn.com/support/wordpress-cache-enabler-plugin#hooks" rel="nofollow ugc">Hooks</a></li>
<li><a href="https://www.keycdn.com/support/wordpress-cache-enabler-plugin#wp-cli" rel="nofollow ugc">WP-CLI</a></li>
<li><a href="https://www.keycdn.com/support/wordpress-cache-enabler-plugin#advanced-configuration" rel="nofollow ugc">Advanced configuration</a></li>
<li><a href="https://www.keycdn.com/support/wordpress-cache-enabler-plugin#faq" rel="nofollow ugc">FAQ</a></li>
</ul>
<h4>Want to help?</h4>
<ul>
<li>Want to file a bug, contribute some code, or improve translations? Excellent! Check out our <a href="https://github.com/keycdn/cache-enabler/issues" rel="nofollow ugc">GitHub issues</a> or <a href="https://translate.wordpress.org/projects/wp-plugins/cache-enabler/" rel="nofollow ugc">translations</a>.</li>
</ul>
<h4>Maintainer</h4>
<ul>
<li><a href="https://www.keycdn.com" rel="nofollow ugc">KeyCDN</a></li>
</ul>


Cache Enabler

The plugin just works. No configuration necessary.

When I had a problem the support team helped super fast and now all my pages are being cached.

Highly recommend this plugin!

Great plugin - fantastic support!

A lightweight caching plugin for WordPress that makes your website faster by generating static HTML files.

OrigiSafe — Advanced Image Optimizer (WebP) — Keep Originals Safe vs Cache Enabler